diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index b9f3682..10647e1 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,23 +4,13 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="7c107abe-5995-4428-8429-b146aaca8386" name="Changes" comment="feat : Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions (WIP)">
-      <change afterPath="$PROJECT_DIR$/frontend/components/reception/reception-unloading.vue" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/frontend/components/ui/loading-dots.vue" afterDir="false" />
+    <list default="true" id="7c107abe-5995-4428-8429-b146aaca8386" name="Changes" comment="feat : Ajout de zod, création d'un composant de chargement loading-dots.vue et finalisation du flow d'une reception">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/config/reference.php" beforeDir="false" afterPath="$PROJECT_DIR$/config/reference.php" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/components/reception/reception-form.vue" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/components/reception/reception-form.vue" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/frontend/components/reception/reception-weight.vue" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/components/reception/reception-weight.vue" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/package-lock.json" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/package-lock.json" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/package.json" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/package.json" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/frontend/layouts/default.vue" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/layouts/default.vue" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/frontend/pages/reception/[[id]].vue" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/pages/reception/[[id]].vue" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/services/dto/reception-data.ts" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/services/dto/reception-data.ts" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/services/dto/weight-data.ts" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/services/dto/weight-data.ts" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/frontend/services/reception.ts" beforeDir="false" afterPath="$PROJECT_DIR$/frontend/services/reception.ts" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/Dto/PontBasculeReading.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Dto/PontBasculeReading.php" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/Entity/Reception.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Entity/Reception.php" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/Entity/Weight.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/Entity/Weight.php" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/State/ReceptionWeighingProvider.php" beforeDir="false" afterPath="$PROJECT_DIR$/src/State/ReceptionWeighingProvider.php" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -255,7 +245,7 @@
       <updated>1767956826164</updated>
       <workItem from="1767956827666" duration="7866000" />
       <workItem from="1768201706520" duration="13383000" />
-      <workItem from="1768287908317" duration="20308000" />
+      <workItem from="1768287908317" duration="21021000" />
     </task>
     <task id="LOCAL-00001" summary="feat : Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions (WIP)">
       <option name="closed" value="true" />
@@ -265,7 +255,15 @@
       <option name="project" value="LOCAL" />
       <updated>1768237763998</updated>
     </task>
-    <option name="localTasksCounter" value="2" />
+    <task id="LOCAL-00002" summary="feat : Ajout de zod, création d'un composant de chargement loading-dots.vue et finalisation du flow d'une reception">
+      <option name="closed" value="true" />
+      <created>1768316052474</created>
+      <option name="number" value="00002" />
+      <option name="presentableId" value="LOCAL-00002" />
+      <option name="project" value="LOCAL" />
+      <updated>1768316052474</updated>
+    </task>
+    <option name="localTasksCounter" value="3" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -286,7 +284,8 @@
     <MESSAGE value="Feat : (WIP) Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions" />
     <MESSAGE value="Feat : Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions (WIP)" />
     <MESSAGE value="feat : Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions (WIP)" />
-    <option name="LAST_COMMIT_MESSAGE" value="feat : Ajout de pinia, création de la table weight et reception mise en place du système de step pour les receptions (WIP)" />
+    <MESSAGE value="feat : Ajout de zod, création d'un composant de chargement loading-dots.vue et finalisation du flow d'une reception" />
+    <option name="LAST_COMMIT_MESSAGE" value="feat : Ajout de zod, création d'un composant de chargement loading-dots.vue et finalisation du flow d'une reception" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
diff --git a/frontend/components/reception/reception-weight.vue b/frontend/components/reception/reception-weight.vue
index a640bf7..d5f07d7 100644
--- a/frontend/components/reception/reception-weight.vue
+++ b/frontend/components/reception/reception-weight.vue
@@ -25,12 +25,12 @@
     <div class="flex justify-center mt-[54px]">
         <button
             class="text-xl uppercase bg-primary-500 text-white h-[50px] w-[272px]"
-            @click="getReceptionWeight"
+            @click="fetchWeight"
         >{{ displayWeight !== null ? 'refaire une pesee' : 'peser' }}</button>
         <button
             v-if="displayWeight !== null"
             class="text-xl uppercase bg-primary-500 text-white h-[50px] w-[272px] ml-4"
-            @click="validateWeight"
+            @click="saveWeight"
         >Valider la pesée</button>
     </div>
 
@@ -38,73 +38,30 @@
 
 <script setup lang="ts">
 import { storeToRefs } from 'pinia'
-import { getWeight } from '~/services/reception'
-import type { WeightData } from '~/services/dto/weight-data'
-import { createWeight, updateWeight } from '~/services/weight'
+import { useWeighing } from '~/composables/useWeighing'
 import { useReceptionStore } from '~/stores/reception'
 
 const props = defineProps<{
     mode: 'gross' | 'tare'
 }>()
 
-const weightData = ref<WeightData | null>(null)
-const localErrorMessage = ref<string | null>(null)
 const receptionStore = useReceptionStore()
 const { current: storeReception, errorMessage: storeErrorMessage } = storeToRefs(receptionStore)
-const errorMessage = computed(() => localErrorMessage.value ?? storeErrorMessage.value)
-const currentWeightEntry = computed(
-    () => storeReception.value?.weights?.find((entry) => entry.type === props.mode) ?? null
-)
-const displayWeight = computed(() => weightData.value?.weight ?? currentWeightEntry.value?.weight ?? null)
-const displayDsd = computed(() => weightData.value?.dsd ?? currentWeightEntry.value?.dsd ?? '-')
-const title = computed(() => (props.mode === 'gross' ? 'Pesée à plein' : 'Pesée à vide'))
-const showLoadingBox = computed(() => displayWeight.value === null && !errorMessage.value)
-
-async function getReceptionWeight() {
-    localErrorMessage.value = null
-    try {
-        weightData.value = await getWeight()
-    } catch (error) {
-        localErrorMessage.value = error?.data?.error ?? error?.message ?? 'Erreur inconnue.'
-    }
-}
-
-async function validateWeight() {
-    localErrorMessage.value = null
-
-    const existingEntry = currentWeightEntry.value
-    const baseDsd = weightData.value?.dsd ?? existingEntry?.dsd ?? null
-    const baseWeight = weightData.value?.weight ?? existingEntry?.weight ?? null
-    const baseWeighedAt = weightData.value?.weighedAt ?? existingEntry?.weighedAt ?? null
-
-    try {
-        if (existingEntry?.id) {
-            await updateWeight(existingEntry.id, {
-                type: props.mode,
-                dsd: baseDsd,
-                weight: baseWeight,
-                weighedAt: baseWeighedAt
-            })
-        } else {
-            await createWeight({
-                reception: `/receptions/${storeReception.value.id}`,
-                type: props.mode,
-                dsd: baseDsd,
-                weight: baseWeight,
-                weighedAt: baseWeighedAt
-            })
-        }
-    } catch (error) {
-        localErrorMessage.value = error?.data?.error ?? error?.message ?? 'Erreur inconnue.'
-        return
-    }
-    // @TODO Voir comment mettre en place la genération du bon, la validation de la reception et le dernier step
-    const nextStep = storeReception.value.currentStep + 1
-    await receptionStore.updateReception(storeReception.value.id, {
-        currentStep: nextStep,
-        isValid: props.mode === 'tare' ? true : storeReception.value.isValid
-    })
-    await receptionStore.loadReception(storeReception.value.id)
-}
+const {
+    displayWeight,
+    displayDsd,
+    title,
+    errorMessage,
+    showLoadingBox,
+    fetchWeight,
+    saveWeight
+} = useWeighing({
+    mode: props.mode,
+    reception: storeReception,
+    updateReception: receptionStore.updateReception,
+    loadReception: receptionStore.loadReception,
+    storeError: storeErrorMessage
+})
+// @TODO Voir comment mettre en place la genération du bon, la validation de la reception et le dernier step
 
 </script>
diff --git a/frontend/composables/useWeighing.ts b/frontend/composables/useWeighing.ts
new file mode 100644
index 0000000..5e8f979
--- /dev/null
+++ b/frontend/composables/useWeighing.ts
@@ -0,0 +1,109 @@
+import { computed, ref } from 'vue'
+import type { Ref } from 'vue'
+import type { ReceptionData, WeightEntryData } from '~/services/dto/reception-data'
+import type { WeightData } from '~/services/dto/weight-data'
+import { getWeight } from '~/services/reception'
+import { createWeight, updateWeight } from '~/services/weight'
+
+export type WeighingMode = 'gross' | 'tare'
+
+type UseWeighingOptions = {
+    mode: WeighingMode
+    reception: Ref<ReceptionData | null>
+    updateReception: (id: number, payload: Partial<ReceptionData>) => Promise<ReceptionData | null>
+    loadReception?: (id: number) => Promise<ReceptionData | null>
+    storeError?: Ref<string | null>
+}
+
+export const useWeighing = ({
+    mode,
+    reception,
+    updateReception,
+    loadReception,
+    storeError
+}: UseWeighingOptions) => {
+    const weightData = ref<WeightData | null>(null)
+    const localErrorMessage = ref<string | null>(null)
+
+    const currentWeightEntry = computed<WeightEntryData | null>(() => {
+        const weights = reception.value?.weights ?? []
+        return weights.find((entry) => entry.type === mode) ?? null
+    })
+
+    const displayWeight = computed(() => weightData.value?.weight ?? currentWeightEntry.value?.weight ?? null)
+    const displayDsd = computed(() => weightData.value?.dsd ?? currentWeightEntry.value?.dsd ?? '-')
+    const title = computed(() => (mode === 'gross' ? 'Pesée à plein' : 'Pesée à vide'))
+    const errorMessage = computed(() => localErrorMessage.value ?? storeError?.value ?? null)
+    const showLoadingBox = computed(() => displayWeight.value === null && !errorMessage.value)
+
+    const fetchWeight = async () => {
+        localErrorMessage.value = null
+        try {
+            weightData.value = await getWeight()
+        } catch (error) {
+            localErrorMessage.value = error?.data?.error ?? error?.message ?? 'Erreur inconnue.'
+        }
+    }
+
+    const saveWeight = async () => {
+        localErrorMessage.value = null
+        if (!reception.value) {
+            localErrorMessage.value = 'Réception introuvable.'
+            return
+        }
+
+        const existingEntry = currentWeightEntry.value
+        const baseDsd = weightData.value?.dsd ?? existingEntry?.dsd ?? null
+        const baseWeight = weightData.value?.weight ?? existingEntry?.weight ?? null
+        const baseWeighedAt = weightData.value?.weighedAt ?? existingEntry?.weighedAt ?? null
+
+        if (baseWeight === null) {
+            localErrorMessage.value = 'Veuillez d’abord peser.'
+            return
+        }
+
+        try {
+            if (existingEntry?.id) {
+                await updateWeight(existingEntry.id, {
+                    type: mode,
+                    dsd: baseDsd,
+                    weight: baseWeight,
+                    weighedAt: baseWeighedAt
+                })
+            } else {
+                await createWeight({
+                    reception: `/receptions/${reception.value.id}`,
+                    type: mode,
+                    dsd: baseDsd,
+                    weight: baseWeight,
+                    weighedAt: baseWeighedAt
+                })
+            }
+        } catch (error) {
+            localErrorMessage.value = error?.data?.error ?? error?.message ?? 'Erreur inconnue.'
+            return
+        }
+
+        const nextStep = reception.value.currentStep + 1
+        await updateReception(reception.value.id, {
+            currentStep: nextStep,
+            isValid: mode === 'tare' ? true : reception.value.isValid
+        })
+
+        if (loadReception) {
+            await loadReception(reception.value.id)
+        }
+    }
+
+    return {
+        weightData,
+        currentWeightEntry,
+        displayWeight,
+        displayDsd,
+        title,
+        errorMessage,
+        showLoadingBox,
+        fetchWeight,
+        saveWeight
+    }
+}
diff --git a/frontend/layouts/default.vue b/frontend/layouts/default.vue
index 2b33892..c9b2d93 100644
--- a/frontend/layouts/default.vue
+++ b/frontend/layouts/default.vue
@@ -23,7 +23,7 @@
                         <a
                             :href="href"
                             @click="navigate"
-                            :class="isActive ? 'opacity-100' : 'opacity-50'"
+                            :class="isReceptionActive ? 'opacity-100' : 'opacity-50'"
                         >
                             Reception
                         </a>
@@ -36,3 +36,8 @@
         </main>
     </div>
 </template>
+
+<script setup lang="ts">
+const route = useRoute()
+const isReceptionActive = computed(() => route.path.startsWith('/reception'))
+</script>
diff --git a/frontend/pages/reception/[[id]].vue b/frontend/pages/reception/[[id]].vue
index a87486a..b66ed38 100644
--- a/frontend/pages/reception/[[id]].vue
+++ b/frontend/pages/reception/[[id]].vue
@@ -3,7 +3,7 @@
     <div v-else>
         <div class="flex justify-between h-[52px] mb-[90px]">
             <p class="self-center">Indicateur d’étapes</p>
-            <NuxtLink to="/" class="flex flex-col justify-center uppercase text-xl bg-black text-white h-[50px] w-[272px] text-center">Mettre en pause</NuxtLink>
+            <NuxtLink to="/" class="flex flex-col justify-center uppercase text-xl bg-black text-white h-[50px] w-[272px] text-center">Mettre en attente</NuxtLink>
         </div>
         <ReceptionForm v-if="storeReception?.currentStep === 0"/>
         <ReceptionWeight v-if="storeReception?.currentStep === 1" mode="gross"/>
@@ -20,7 +20,7 @@ const route = useRoute()
 const router = useRouter()
 
 const receptionStore = useReceptionStore()
-const { current: storeReception, isLoading, errorMessage } = storeToRefs(receptionStore)
+const { current: storeReception, errorMessage } = storeToRefs(receptionStore)
 
 onMounted(async () => {
     const raw = route.params.id
diff --git a/src/Entity/Weight.php b/src/Entity/Weight.php
index 197e8f4..0b619b5 100644
--- a/src/Entity/Weight.php
+++ b/src/Entity/Weight.php
@@ -11,9 +11,11 @@ use ApiPlatform\Metadata\Patch;
 use ApiPlatform\Metadata\Post;
 use DateTimeImmutable;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Serializer\Attribute\Context;
 use Symfony\Component\Serializer\Attribute\Groups;
 use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
+use Symfony\Component\Validator\Constraints as Assert;
 
 #[ORM\Entity]
 #[ORM\Table(name: 'weight')]
@@ -31,6 +33,7 @@ use Symfony\Component\Serializer\Normalizer\DateTimeNormalizer;
         ),
     ],
 )]
+#[UniqueEntity(fields: ['reception', 'type'], message: 'A weighing already exists for this type.')]
 class Weight
 {
     #[ORM\Id]
@@ -46,10 +49,12 @@ class Weight
 
     #[ORM\Column(nullable: true)]
     #[Groups(['reception:read', 'weight:read', 'weight:write'])]
+    #[Assert\PositiveOrZero]
     private ?int $dsd = null;
 
     #[ORM\Column(nullable: true)]
     #[Groups(['reception:read', 'weight:read', 'weight:write'])]
+    #[Assert\PositiveOrZero]
     private ?int $weight = null;
 
     #[ORM\Column(type: 'datetime_immutable', nullable: true)]
@@ -59,6 +64,8 @@ class Weight
 
     #[ORM\Column(length: 10)]
     #[Groups(['reception:read', 'weight:read', 'weight:write'])]
+    #[Assert\NotBlank]
+    #[Assert\Choice(choices: ['gross', 'tare'])]
     private string $type = 'gross';
 
     public function getId(): ?int